The 5.56mm M27 Infantry Automatic Rifle has remained a favorite rifle of the Marine Corps for the better part of this decade. Based on the Heckler & Koch HK416 assault rifle and adopted in 2011 to replace the M249 Squad Automatic Weapon, it’s widely considered more versatile and accurate over a longer range than the average weapon — so much so that the Corps has even discussed replacing every infantry Marine’s M4 carbine with an IAR variant in coming years.

“America! Ahhhhh!” roars Chief Warrant Officer Christian Wade as he unloads with the M27 Infantry Automatic Rifle — and not with any of that wimpy “pew, pew, pew” slow and steady squeeze stuff. The 2nd Marine Division gunner goes full auto in his latest fact or fiction video, before pausing to ask: “Is that really necessary?”